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Using various AFM classical ground states as CCM model states we present results for their gs energy, average on-site magnetization, and susceptibilities to plaquette valence-bond crystal (PVBC) and crossed-dimer valence-bond crystal ("},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1202.2722","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2012-02-13T13:30:25Z","cross_cats_sorted":[],"title_canon_sha256":"929432e3286f5627445fa4a4a183c00f5af9c5857ec2bd4bc7117bf1e47ad4d9","abstract_canon_sha256":"85c4322f1c1a81a871f9d884aa4f35c5be42c179b17c8e5ea36bf567bbd7fd9e"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:55:46.498692Z","signature_b64":"qUmQJVouGwZDwuqnTWdDazTs139EKBQeK9aPXnZIVcML10slheMmPxxzEXv4PA9AjETrxhbQrLDLAk7aQym+Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d9ae405aa6d8d7c60898204da137c0a552c9cee4f5dd1ca48dc5585a991a0601","last_reissued_at":"2026-05-18T03:55:46.498287Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:55:46.498287Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The frustrated Heisenberg antiferromagnet on the checkerboard lattice: the $J_{1}$--$J_{2}$ model","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"C. 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